Railroad-spike.



PATENTBD JAN. 27, 1903.

J. PEDERsoNl Y RAILROAD SPIKE.

IUATION LED JULY 24 lv Jamg demw?,

drains JACOB PEDERSON, OF ROSEAU, MINNESOTA.

RAiLROAD-SPIKE.

SLECIFEUATKON formingpart of Letters :Patent No. 719,036, dated January27, 1903. Application filed July 24,1962. SerialINo. 116.824. (Nomodel.)

To @ZZ whom, it may concern:

Be it known that l, JACOB PEDERSON, a citizen ofthe UnitedStates,residing at Roseau, in the county of Roseau and State ofMinnesota, have invented cert-ain new and useful Improvements inRailroad-Spikes; and I do declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same.

The invention" relates to railroad-spikes- The object of the inventionis to provide a spike with means whereby when the spike is driven homeit may be looked in position against accidental withdrawal orretraction.

With this and other objects in view the invention consists of certainnovel features of construction, combination, and arrangement of parts,which will be hereinafter more fully described, and particularly pointedout in the appended claims.

In the accompanying drawings, Figure l is a perspective view of a spike,taken from one side. Fig. 2 is a similar view taken from the oppositeside with the dog protruded; and Fig. 3 is atransverse sectional viewthrough the spike and tie, showing the locking-dog driven into the tieto prevent the withdrawal of the spike.

Referring to the drawings, l denotes the spike, which in general outlinemay be of any well-known or approved construction. head l of the spikeis formed with a vertical aperture 2 at one side thereof, and the bodyis formed witlra bore 3, which communicates with said aperture andextends diagonally lengthwise the body of the spike and communicateswith the dog-chamber 5.

6 denotes a dog having one end pivoted in said chamber and having itsopposite end formed with a beveled or chiseled head 7.

S denotes a pushhar having formed at its upper end a head 9, which islocated in the aperture 2 of the head of the spike, the body portion ofthe bar being located in the bore and free to vibrate therein and thelower end being pivoted to the dog by a pivot 10.

In driving the spike the chiseled head of the dog is located within itschamber, and

The'

due to the inclined face 12 of the dog any tendency of the dog to workout of its chamber in the driving movement of the spike is resisted byreason of the inclined face coming in contact with the fiber of the tieor other body into which'the spike is driven and forcing the head anddog back into the chamber. After the spike has been driven a tool orimplement is inserted in the hole 2 of the head and the head ofthedriving-bar driven slightly downward, which action forces the head ofthe locking-dog outwardly to bury the same into the fiber of the wood,and thus prevent the accidental withdrawal. or retraction of the spike.The shape of the head of the dog is such that it may be easily andquickly forced into the wood after the spike has been driven home, andwhen in the position shown in Fig. 3 it is absolutely impossible for thespike to accidentally work loose.

From the foregoing description, taken in connection with theaccompanying drawings, the construction, mode of operation, andadvantages of the invention will be readily understood without requiringan extended eX- planation.

Various changes in the form, proportion, and details of construction maybe made within the scope of the invention without departing from thespirit or sacrificing any of the` advantages thereof.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is-

l. A spike having a dog-chamber and a bore communicating with thedog-chamber, a dog located in said chamber, and a push-bar free tovibrate within said bore and pivotally connected to said dog,substantially as described.

2. Aspike having an aperture formed in its head and a bore extendingdiagonally lengthwise the body portion of the spike and communicatingwith said aperture, said spike having a chamber formed Vat. its lowerend in communication with the bore and opening at the side of the spike,in combination with a dog having its inner end pivoted in said chamberand provided with a chiseled or beveled head which is adapted to beprojected through In testimony whereof I have hereunto set the chamberand buried into the material into my hand in presence of two subscribingWit- Which the Spike is driven, and a bar located nesses.

in the bore and pivotally connected to the JACOB PEDERSON. 5 dog andhaving its upper end projecting into Witnesses:

the aperture in the head of the spike, sub- A. WOOG,

stantially as set forth. l JACOB WURSOHMIDT.

